Data sources

Each value Trefle shows for Ophioglossum engelmannii, with what every source says about it. When sources disagree, the strongest source is shown (how sources are ranked). Values imported before sources were recorded one by one are marked Source not recorded.

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Sourced2 Source not recorded9 Not on the record2 Sources: TRY Plant Trait Database, Earlier Trefle data

Field	Shown	What the sources say
Core
Author	Prantl	No source recorded	Source not recorded
Bibliography	Ber. Deutsch. Bot. Ges. 1: 351 (1883)	No source recorded	Source not recorded
Phylum	Tracheophyta	No source recorded	Source not recorded
Rank	species	No source recorded	Source not recorded
Status	accepted	No source recorded	Source not recorded
Year	1883	No source recorded	Source not recorded
Descriptive
Common name	Limestone adder's-tongue	No source recorded	Source not recorded
Observations	U.S.A. to C. America	No source recorded	Source not recorded
Morphology
Average height	empty	3.9 cm · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 415	Not on the record
Growth habit	Forb/herb	Forb/herb · Earlier Trefle data · Reported · 2026-10-19 value present before provenance tracking (2022 import), no source recorded	Sourced
Vegetable	false	No source recorded	Source not recorded
Phenology
Bloom months	mar, apr	mar, apr · TRY Plant Trait Database · Measured · 53 observations · 2026-10-09 TRY 7.0 datasets 163, 415	Sourced
Usda legacy
C n ratio	empty	44 · TRY Plant Trait Database · Measured · 1 observation · 2026-10-09 TRY 7.0 datasets 415	Not on the record

Ophioglossum engelmannii Prantl, 1883 12% complete

Limestone adder's-tongue

.fa-secondary{opacity:.4} Data sources

Data sources